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Coherence Live Events Harvey Raja Consulting Member Technical Staff, Cloud Application Foundation Oracle Coherence

Oracle Fusion Middleware 12c Cloud Application Foundation You Video Series

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Cloud Application Foundation Coherence 12c Demonstration – Live Events §  Complete

§  Open

§  Integrated

§  Best in Class

§  On Premise – Private Cloud

§  Public Cloud Cloud Application Foundation

Traffic Director/Web Tier

WebLogic Server Coherence Tuxedo

Virtual Assembly Builder

ORACLE Cloud

Exalogic Elastic Cloud

Live Events


Coherence Eventing Mechanisms

§ MapListener –  Client-side “post”-events

§ Triggers –  Server-side “pre”-events

§ Backing Map Listeners –  Server-side “post”-events

§ Others –  PartitionListener, MemberListener, ServiceListener

Existing


Coherence Eventing Mechanisms

§ Distinct registration mechanism per event type

§ No commonality for client interfaces or events

§ Are the events synchronously or asynchronously dispatched?

Disadvantages


Live Event Model

§ EntryEvent –  Data related

§ EntryProcessorEvent –  EntryProcessor invocation

§ TransferEvent –  Partition redistribution

§ TransactionEvent –  Cross cache event

PartitionedCache PartitionedService


Data-Related Events

§ BinaryEntry-based

public interface EntryEvent! extends Event<EntryEvent.Type> ! { ! /** ! * Return the immutable Set of {@link BinaryEntry entries} on which the ! * action represented by this {@link EntryEvent} occurred. ! * ! * @return the Set of entries represented by this event ! */ ! public Set<BinaryEntry> getEntrySet(); !!! public static enum Type ! { ! INSERTING, INSERTED, UPDATING, UPDATED, REMOVING, REMOVED ! } ! } !


Data-Related Events

NamedCache.put()NamedCache.put()EventInterceptor

INSERTING

EventInterceptor

INSERTING

101101100010101011010011

Backup

(async)INSERTED

Backup

(async)INSERTED


EntryProcessor-Related Events


public interface EntryProcessorEvent! extends Event<EntryEvent.Type> ! { ! public Set<BinaryEntry> getEntrySet(); !! /** ! * Return the {@link EntryProcessor} associated with this {@link ! * EntryProcessorEvent}. ! * ! * @return the entry processor associated with this event ! */ ! public EntryProcessor getProcessor(); !! public static enum Type ! { ! EXECUTING, EXECUTED ! } ! } !


EntryProcessor-Related Events

NamedCache.invoke()NamedCache.invoke() EventInterceptor

EXECUTING

EntryProcessor

EventInterceptor

EXECUTING

EntryProcessor101101100010101011010011

101101100010101011010011

Backup(async)EXECUTED

Backup(async)EXECUTED


Transfer-Related Events


public interface TransferEvent! extends Event<EntryEvent.Type> ! { ! public int getPartitionId(); ! public Member getLocalMember(); ! public Member getRemoteMember(); ! /** ! * Return a map of cache names and associated set of read-only {@link ! * BinaryEntry entries} encapsulated in this {@link TransferEvent}. The ! * returned map and contained sets are immutable. ! * ! * @return a map of cache names and associated set of entries ! */ ! public Map<String, Set<BinaryEntry>> getEntries(); !! public static enum Type ! { ! DEPARTING, ARRIVED ! } ! } !


ARRIVEDARRIVED

Transfer-Related Events

EventInterceptor EventInterceptor

EventInterceptor

EventInterceptor

DEPARTING

EventInterceptor

DEPARTING

EventInterceptor

DEPARTING

EventInterceptor

DEPARTING


Transaction-Related Events

§ All entries enlisted within a partition local transaction § BinaryEntry-based

public interface TransactionEvent! extends Event<TransactionEvent.Type> ! { ! /** ! * A set of {@link BinaryEntry entries} enlisted within this ! * transaction. ! * ! * @return a set of entries enlisted within this transaction ! */ ! public Set<BinaryEntry> getEntrySet(); !! public static enum Type ! { ! COMMITTING, COMMITTED ! } ! } !


COMMITTEDBackup (async)

EventInterceptor

Transaction-Related Events

NamedCache.invokeAll({A,B})NamedCache.invokeAll({A,B}) EntryProcessor

Keys:{A,B}Keys:{A,B}

enlist:{C}enlist:{C}

COMMITTING:{A,B,C}COMMITTING:{A,B,C}

COMMITTEDBackup (async)


Registration

§ distributed-scheme –  PartitionedService level interceptors: TransferEvent & TransactionEvent –  PartitionedCache events for all caches

§  cache-scheme-mapping –  PartitionedCache level interceptors: EntryEvent & EntryProcessorEvent –  Ties to caches that conform to the cache-name pattern

§ Use Annotation & Generics to filter events

Declarative – Cache Configuration


Registration Declarative – Cache Configuration


Registration

§ ConfigurableCacheFactory holds an InterceptorRegistry:

§ Annotation and Generics on interceptor are honored

§ Services and caches can be filtered by implementing: EventDispatcherAwareInterceptor

Programmatic


Join the Coherence Community http://coherence.oracle.com

@OracleCoherence

/OracleCoherence

blogs.oracle.com/OracleCoherence

Group: Oracle Coherence Users

/OracleCoherence

coherence.oracle.com/display/CSIG Coherence Special Interest Group

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Coherence Live Events Harvey Raja Principal Member Technical Staff, Cloud Application Foundation Oracle Coherence

Oracle Fusion Middleware 12c Cloud Application Foundation You Video Series

oracle fusion middleware 12c - oracle coherence... coherence live events harvey raja consulting...

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